Did you know?
Time since the emergence of multicellular life (2.1 billion y) is 5 x Time since the end of the Silurian geologic period (419 million y)
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Other land in United States (2011) (2.18 km^2)
If this was a standard unit ...
Yes, there's now a book based on these numbers. Oxford University Press: July 2018.
Click here to learn more about it.
Click here for Podcast: Andrew Elliott interviewed for New Books Network.